EP0302625B1 - Procédé pour préparer des surfaces lubrifiées - Google Patents

Procédé pour préparer des surfaces lubrifiées Download PDF

Info

Publication number
EP0302625B1
EP0302625B1 EP88306635A EP88306635A EP0302625B1 EP 0302625 B1 EP0302625 B1 EP 0302625B1 EP 88306635 A EP88306635 A EP 88306635A EP 88306635 A EP88306635 A EP 88306635A EP 0302625 B1 EP0302625 B1 EP 0302625B1
Authority
EP
European Patent Office
Prior art keywords
plasma
lubricant
treated
accordance
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88306635A
Other languages
German (de)
English (en)
Other versions
EP0302625A3 (en
EP0302625B2 (fr
EP0302625A2 (fr
Inventor
Can B. Hu
Donald D. Solomon
Victor A. Williamitis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Becton Dickinson and Co
Original Assignee
Becton Dickinson and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22162702&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0302625(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Becton Dickinson and Co filed Critical Becton Dickinson and Co
Priority to AT88306635T priority Critical patent/ATE95466T1/de
Publication of EP0302625A2 publication Critical patent/EP0302625A2/fr
Publication of EP0302625A3 publication Critical patent/EP0302625A3/en
Publication of EP0302625B1 publication Critical patent/EP0302625B1/fr
Application granted granted Critical
Publication of EP0302625B2 publication Critical patent/EP0302625B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • C08J7/123—Treatment by wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/14—Surface shaping of articles, e.g. embossing; Apparatus therefor by plasma treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers

Definitions

  • syringes cannulas and catheters used for sampling or medicament administration or devices such as burets used in diagnostic procedures, have components which are in sliding contact during use.
  • Such devices require lubrication of the moving parts and may well also require lubrication of an external surface.
  • polymers have come to the fore as materials of choice for fabrication of devices.
  • polymers have many salubrious properties which make them useful in medical devices, such as flexibility and biocompatibility consequent to chemical inertness, they have the disadvantage of being materials of low surface energy.
  • Lubrication of surfaces of low surface energy is a long-standing problem because of the propensity of lubricants to migrate from surface to surface interfaces or to "bead" on an external surface. Either phenomenon severely limits the effectiveness of a lubricant on a low-energy surfaces.
  • the antithesis of beading i.e., the ability of a liquid to spread out and cover a surface is termed wettability and this property is measured by the conventional contact angle formed between the surface and a drop of the liquid applied to the surface. A high contact angle is indicative of beading. Conversely, a low contact angle indicates the desired wetting. Complete spreading giving a uniform coating of the liquid on the surface is indicated by the theoretical contact angle of 0 °.
  • U.S. Patent No. 4,072,769 to Lidel discloses treatment of a polymeric surface with a plasma from an activator gas and a reactive gas whereby surface wettability to water is increased but wettability to an oil is decreased, thereby inhibiting penetration of the oil into the polymer.
  • Enhancement of ink receptivity rendering Polymeric surfaces printable is achieved by plasma treatment in U.S. Patent No. 4,292,397 to Takeuchi et al.
  • Auerbach in U.S. Patent No. 4,188,426, discloses plasma deposition of a fluorocarbon coating onto an organic or inorganic surface wherein the lubricity, hydrophobicity and coefficient of friction of the resulting fluorocarbon surface are equivalent to those provided by conventional fluorocarbon polymers.
  • EP 201915-A discloses a method for reducing breakout and sustaining forces of a surface adapted for slidable engagement with another surface comprising applying silicone oil to a surface and treating said surface and said silicone oil thereon with an ionizing plasma.
  • a low energy polymeric surface is lubricated by treating the surface with plasma and lubricating the plasma-treated surface by applying thereto a film of a silicone oil.
  • Low energy polymeric surfaces such as polyethylene, polypropylene, or most preferably, a perfluorinated polymer, such as fluorinated ethylene propylene polymer (FEP) are particularly suited to lubrication by the method of the invention.
  • FEP fluorinated ethylene propylene polymer
  • the choice of lubricant depends on the low energy surface.
  • the lubricant has a surface tension substantially the same as, or lower, than the surface energy of the plasma-treated polymeric surface.
  • a polysiloxane lubricant is applied to the plasma- treated surface.
  • lubricating oils may be applied to the lowest surface energy polymers known, the perfluorinated hydrocarbon polymers exemplified by FEP in uniform fully- spread coatings.
  • the coatings exhibit no tendency to migrate or bead for protracted periods, i.e., they have been observed to be stable for periods of two years or more.
  • the method of the invention is particularly well-suited, but not limited, to biomedical devices such as needles, syringes, catheters and the like, and greatly extends the usefulness of low-energy polymers in fabrication of such devices.
  • the present invention overcomes the problems of beading and migration with respect to application of lubricating oils to a surface and provides thereby a method to achieve even coatings of lubricants on materials of low surface energy.
  • the lubricant coatings of the invention are uniform in thickness, cover the entire surface of the material and are stable for protracted periods.
  • Any material which, when fabricated into a useful device, exhibits a surface of low energy may be lubricated by the method of the invention.
  • Suitable materials may be metal, glass, ceramic, or preferably, polymers.
  • Representative nonlimiting examples of polymers responsive to the method are polyolefins such as polyethylene, and polypropylene, polystyrene, polyurethane, polyvinyl chloride or copolymers thereof.
  • Particularly preferred surfaces are the perfluorohydrocarbon polymers, as exemplified by polytetrafluoroethylene (Teflon R) and FEP.
  • a perfluorinated polymer surface is treated with a plasma generated from a gas, such as nitrogen neon, argon, xenon, krypton and the like or mixtures thereof.
  • a gas such as nitrogen neon, argon, xenon, krypton and the like or mixtures thereof.
  • the preferred gas for plasma generation is argon.
  • plasma is used generally to describe the state of ionized gas, and consists of positively or negatively charged molecules or atoms, negatively charged electrons as well as neutral species.
  • the plasma may be generated by combustion, flames, physical shock or preferably by electrical discharge, such as a corona or most preferably a glow discharge. Glow discharge is most preferred because it is a cold plasma which does not deform polymeric surfaces of low melting point as may occur when using plasma generated by heat, as coronas.
  • a typical plasma generator as, for example, those described in U.S. Patent No. 3,847,652, consists of a reaction chamber, a high frequency generator and matching network, high vacuum system, gas delivery system and temperature controllers.
  • a wide range of power settings, radio frequencies, durations of exposure, temperatures, gas pressures and gas flow rates may be used for plasma generation. Ranges for these parameters which provide advantageous results are DC or AC power levels of up to 1000 watts, RF frequency of 0.05 to 50 megaherz, 0.01 to 12 hours, 0 to 200 ° C, 0.1 to 100 torr and 1-200 cubic centimeters/sec.
  • the plasma-treated surface thus generated is not lubricious and is not a lubricated surface satisfactory for fabrication of biomedical articles.
  • Lubricity is introduced in the second step of the method of the invention by applying a thin film of a polysiloxane lubricant of surface tension substantially the same or less than the surface energy of the plasma-treated surface.
  • the preferred lubricant is a silicone oil or mixture thereof having a molecular weight of from about 100 to 1,000,000, preferably from about 1,000 to 100,000.
  • the most preferred lubricant is a polysiloxane oil or mixture thereof having a molecular weight of from about 100 to 1,000,000, preferably from about 1,000 to 100,000.
  • the most preferred class of lubricants is the polydialkylsiloxanes of general structure I: wherein R and R' may be independently a lower alkyl of 1 to 20 carbon atoms, preferably 1 to 8 carbon atoms, or may be joined into a silicon-containing ring of 5 to 8 carbon atoms, and n may be an integer from 1 to 2000, preferably 1 to 800.
  • the preferred lubricants of structure I have viscosities of from about 10 to 100,000, preferably about 100 to 20,000 centistokes.
  • a film of lubricant to the deposited polymeric surface may be accomplished by any suitable method, as, for example, dipping, brushing, spraying and the like.
  • the lubricant may be applied neat or it may be applied in a solvent, and the solvent subsequently removed by evaporation.
  • the lubricant film may be of any convnenient thickness, and in practice, the thickness will be determined by such factors as the viscosity of the lubricant and the temperature of the application. For reasons of economy, the film preferably is applied as thinly as practical, since no significant advantage is gained by thicker films.
  • Fluorocarbon polymers treated with a plasma and a silicone oil have greatly reduced contact angles between the surface and the oil compared to untreated surfaces.
  • the treated surfaces are fully wettable, and the silicone-wetted surfaces are smooth, even and stable.
  • Table 1 below shows contact angles of beads of silicone fluids of various viscosities on untreated FEP and fully wetted surfaces after argon plasma treatment. It is seen that full wettability by the silicone fluid occurs regardless of the viscosity of the oil.
  • the C ls peak at 292 eV clearly originates from the carbon in the carbon-fluorine bonding, while that at 285 eV originates from the carbon in the carbon- carbon bonding.
  • the shift of the major C ls binding energy peak after argon plasma treatment suggests that a significant number of fluorine atoms is cleaved and an increased number of carbon-carbon bonds is formed.
  • the cleavage of fluorine atoms from the argon plasma-treated FEP is confirmed by a sharp decrease in the fluorine atomic ratio from 63% to 19.5% as shown in Table 2.
  • Tm thermal transition temperature
  • the preferred argon plasma-treated surfaces of the invention are stable, i.e., remain fully wettable by silicone oil for periods of two years or more.
  • Table 3 shows ESCA data after 21 months storage for comparison with, the ESCA data on the initial argon plasma-treated FEP surface (entry 7 of Table 2). It is seen that the surface composition is substantially the same after 18 and 21 months.
  • FEP was treated with an argon plasma using a Plasma-Therm, Inc. (Kresson, NJ) model 2430 unit.
  • Argon gas at 0.3 torr was passed between two external capacitive excitation plates. Gas excitation took place at a net RF power not exceeding 500 watts, delivered from the radio-frequency generator. After reacting on the sample surface, the flowing gas was deactivated and passed out of the exhaust system as neutral gas along with any other product gases.
  • the chamber temperature was controlled by the circulating fluid which acts as a heat sink on which the polymers rest.
  • Example I The FEP surface of Example I was evaluated by ESCA with an AEI-100 photoelectron spectrometer modified to include a 20 liter/sec turbomolecular pump and a 110 liter/sec ion pump to speed up the evacuation and minimize the contamination of the sample chamber.
  • the window was set at 20 eV for all the elements to obtain a better resolution.
  • a scanning rate of 2 eV/sec was used for all experiments.
  • Thermal transition temperatures were measured using a Perkin-Elmer DSC-IV. The heating rate was 10 ° C/min. The sample weight was approximately 10-15 mg. All the temperatures reported were the first runs of samples in order to eliminate any heat history.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Lubricants (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Materials For Medical Uses (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Claims (7)

1. Méthode pour préparer une surface lubrifiée comprenant le traitement d'une surface en polymère avec un plasma généré à partir d'un gaz pour donner une surface en polymère traitée avec un plasma et l'application sur la surface d'un film de lubrifiant siloxane, caractérisée en ce que le lubrifiant n'a pas été traité avec un plasma, ledit film ayant une tension superficielle qui est pratiquement la même que - ou inférieure à - l'énergie superficielle de ladite surface traitée avec un plasma, ledit film mouillant de ce fait complètement ladite surface traitée au plasma.
2. Méthode suivant la Revendication 1, dans laquelle ladite surface en polymère est choisie parmi le groupe constitué par le polyéthylène, le polypropylène, le polyuréthane, le polystyrène, le chlorure de polyvinyle, le polytétrafluoroéthylène et le polymère de polypropylène éthylène fluoré.
3. Méthode suivant la Revendication 1, dans laquelle ledit gaz est choisi parmi le groupe constitué par l'azote, l'argon, le néon, le xénon, le krypton et leurs mélanges.
4. Méthode suivant la Revendication 1, dans laquelle le lubrifiant polysiloxane est un polydialkylsiloxane de la formule
Figure imgb0007
dans laquelle R et R1 peuvent être indépendamment l'un de l'autre un groupement alkyle de 1 à 20 atomes de carbone ou bien sont réunis en un cycle de 5 à 8 atomes de carbone et n est un nombre entier de 1 à 2.000.
5. Méthode suivant la Revendication 4, dans laquelle ledit polydialkylsiloxane est le polydiméthylsiloxane.
6. Méthode suivant la Revendication 4, dans laquelle ledit lubrifiant a une viscosité d'environ 10 à 100.000 centistokes.
7. Méthode de la Revendication 1, dans laquelle la surface en polymère est un polymère perfluoré et le plasma est généré en faisant passer une décharge d'une radiofréquence de 50 kilohertz à travers de l'argon gazeux.
EP88306635A 1987-08-03 1988-07-20 Procédé pour préparer des surfaces lubrifiées Expired - Lifetime EP0302625B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88306635T ATE95466T1 (de) 1987-08-03 1988-07-20 Verfahren zur herstellung von oberflaechen mit gutem gleitverhalten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8120087A 1987-08-03 1987-08-03
US81200 1987-08-03

Publications (4)

Publication Number Publication Date
EP0302625A2 EP0302625A2 (fr) 1989-02-08
EP0302625A3 EP0302625A3 (en) 1990-06-13
EP0302625B1 true EP0302625B1 (fr) 1993-10-06
EP0302625B2 EP0302625B2 (fr) 1997-01-22

Family

ID=22162702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88306635A Expired - Lifetime EP0302625B2 (fr) 1987-08-03 1988-07-20 Procédé pour préparer des surfaces lubrifiées

Country Status (5)

Country Link
EP (1) EP0302625B2 (fr)
JP (1) JPH0751642B2 (fr)
AT (1) ATE95466T1 (fr)
CA (1) CA1334744C (fr)
DE (1) DE3884711T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6296893B2 (en) 1997-12-04 2001-10-02 Schott Glass Pharmaceutical packing device comprising a hollow plastic body having an improved internal lubricant layer and method of making same

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5185006A (en) * 1990-12-17 1993-02-09 Becton, Dickinson And Company Lubricated metal articles and assembly containing same
FR2776192B1 (fr) * 1998-03-20 2001-05-18 Ass Pour Les Transferts De Tec Materiau a usage medical presentant un faible coefficient de glissement et procede d'obtention
DE10057293C1 (de) * 2000-11-17 2002-05-23 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zur Herstellung einer Aluminiumfolie aus einem Aluminiumwerkstoff
US7041088B2 (en) * 2002-10-11 2006-05-09 Ethicon, Inc. Medical devices having durable and lubricious polymeric coating
US7687144B2 (en) * 2003-02-20 2010-03-30 Wilson-Cook Medical, Inc. Medical device with adherent coating, and method for preparing same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462335A (en) * 1965-09-13 1969-08-19 Bell Telephone Labor Inc Bonding of thermoplastic composition with adhesives
JPS54156083A (en) * 1978-05-31 1979-12-08 Shin Etsu Chem Co Ltd Composite molded article of vinyl chloride resin and silicone
JPS6043856B2 (ja) * 1978-06-15 1985-09-30 チッソ株式会社 ジアルキルポリシロキサンおよび潤滑剤
US4508606A (en) * 1983-02-27 1985-04-02 Andrade Joseph D Process for treating polymer surfaces to reduce their friction resistance characteristics when in contact with non-polar liquid, and resulting products
JPS59217731A (ja) * 1983-05-25 1984-12-07 Toray Ind Inc フツ化オレフイン重合体成形物の表面処理方法
JPS612738A (ja) * 1984-06-13 1986-01-08 Sumitomo Electric Ind Ltd 合成樹脂成形品の表面処理方法
CA1271160A (fr) * 1985-05-16 1990-07-03 Joel L. Williams Methode de lubrification au plasma ionisant
US4664657A (en) * 1985-06-18 1987-05-12 Becton, Dickinson And Company Lubricant for catheter assemblies employing thermoplastic catheters
GB8708876D0 (en) * 1987-04-14 1987-08-05 Qmc Ind Res Ice release surfaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6296893B2 (en) 1997-12-04 2001-10-02 Schott Glass Pharmaceutical packing device comprising a hollow plastic body having an improved internal lubricant layer and method of making same

Also Published As

Publication number Publication date
DE3884711D1 (de) 1993-11-11
EP0302625A3 (en) 1990-06-13
JPS6470536A (en) 1989-03-16
ATE95466T1 (de) 1993-10-15
DE3884711T2 (de) 1994-02-10
DE3884711T3 (de) 1997-05-28
CA1334744C (fr) 1995-03-14
EP0302625B2 (fr) 1997-01-22
JPH0751642B2 (ja) 1995-06-05
EP0302625A2 (fr) 1989-02-08

Similar Documents

Publication Publication Date Title
US4842889A (en) Method for preparing lubricated surfaces
EP0329041B1 (fr) Procédé pour préparer des surfaces lubrifiées
EP0227340B1 (fr) Composition filmogène
EP2676741B1 (fr) Article amélioré à surface lubrifiée et procédé
US4806430A (en) Film-forming silicone compositions having lubricating properties
US5736251A (en) Lubricious silicone surface modification
US6887578B2 (en) Fluorocarbon-organosilicon copolymers and coatings prepared by hot-filament chemical vapor deposition
Gengenbach et al. Evolution of the surface composition and topography of perfluorinated polymers following ammonia-plasma treatment
US8084103B2 (en) Method for treating a hydrophilic surface
CA2342330A1 (fr) Articles textiles ou vetements pourvus d'un revetement super hydrophobe
JP2002524313A (ja) 超疎水性被覆基体
EP1242515A1 (fr) Traitement de surface d'un materiau polymere organique
EP0302625B1 (fr) Procédé pour préparer des surfaces lubrifiées
EP3320986A1 (fr) Revêtements hydrophiles, multifonctionnels ultraminces avec une excellente stabilité et durabilité
AU2012271807B2 (en) Process for in situ plasma polymerization of silicone coating for surgical needles
Yang et al. Wettability and lubrication of polytetrafluorethylene (PTFE) by UV-induced graft copolymerization on plasma-treated surface
JP7332609B2 (ja) 接着のためのケイ素ベースの保護フィルム、その製造方法及びその利用
JP2012530831A (ja) 潤滑化フィルムを調製するための方法、こうして得られた固体支持体、および、調製キット
Wu et al. Pulsed plasma polymerizations: film chemistry control and applications
Demirci et al. Graft-Polymerization Of N-Vinyl-2-Pyrolidone, Allylamine And Acrylic Acid Onto PVC Film By Plasma Treatments
WO2023122657A1 (fr) Composition de revêtement pour application de siliconage
BLACKNELL Modification of PTFE using low-pressure and atmospheric-pressure plasma methods
Yuliang et al. Pulsed Plasma Polymerizations: Film Chemistry Control and Applications

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

17P Request for examination filed

Effective date: 19900807

17Q First examination report despatched

Effective date: 19910812

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19931006

Ref country code: BE

Effective date: 19931006

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19931006

Ref country code: NL

Effective date: 19931006

Ref country code: CH

Effective date: 19931006

Ref country code: SE

Effective date: 19931006

Ref country code: AT

Effective date: 19931006

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19931006

Ref country code: LI

Effective date: 19931006

REF Corresponds to:

Ref document number: 95466

Country of ref document: AT

Date of ref document: 19931015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3884711

Country of ref document: DE

Date of ref document: 19931111

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: HOECHST AKTIENGESELLSCHAFT WERK KALLE-ALBERT

Effective date: 19940701

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19970122

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

Free format text: AUFRECHTERHALTUNG DES PATENTES IN GEAENDERTER FORM

ET3 Fr: translation filed ** decision concerning opposition
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970709

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970711

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970725

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980720

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST